Reset Key/Button in unity 5.2?

i am making a simple game for a few friends where you have a bunch of cars and you can crash them into each other but you can get stuck in some places and i was thinking of making a button that would reload the level or move the car to where it started

Here a Simple function for Restart your Level with Key “R”

 void Update () 
    {
    	if (Input.GetKeyDown (KeyCode.R)) 
    	{
                 // Restart Loaded Level
                 Application.LoadLevel(Application.loadedLevel);`
             }
    }